This paper presents a class AB amplifier with enhanced transconductance and slew rate using adaptive biasing technique and new drivers. Adaptive biasing configuration provides a tail current dependent on the input signal to increase the slew rate during slewing phase. In addition, the new structure benefits from new drivers to enhance the transconductance which are supported by adaptive biasing configuration. These enhancement techniques lead to the input and output class AB structures for fast settling applications. The proposed structure is simulated in 65-nm CMOS technology which shows a 16.2-dB enhancement in DC gain and a 72% reduction in settling time compared to the conventional structure.
